What Is Contemporary Right-Wing Politics? The wagon-circling has another component that leads to bad consequences, which is its tendency to shrink the solid base upon which a given ideology stands.
If an ideology has a high degree of sociocultural dominance, then massive retaliation against even moderate dissenters serves as a means of cementing that ideology's hold, because ideological dominance relies on the perception that the ideology is universal or near-universal. If you think that everyone agrees on X, you won't dare to contradict it, especially when you see even mild disagreement being quashed with extreme prejudice. This last serves as evidence that the given ideology (whatever it is) really is (near) universal.
Once this dominance is lost, however, attacking even mild dissenters is no longer a winning strategy, because the cat is already out of the bag; you're not going to convince anyone that your way of thinking is the default by viciously attacking all dissenters, because the jig is up and we all know that dissent is now socially acceptable. In fact, the massive retaliation against any and all dissenters now has the opposite effect, because it simultaneously vindicates those who claim to have been previously suppressed and makes people reticent to agree with you instead of compelling their agreement.
The sociocultural dominance of an ideology is self-sustaining when strong (perception of being the default --> nobody challenges --> stronger perception of being the default), and this reciprocal self-strengthening inverts into a spectacular meltdown once dominance is lost, since the tactics that formerly made it strong and became stronger with it now do the opposite.